HI Fishlore community. I've been thinking about mixing my own Macro nutrient solution without using KNO3. I've been using a pre made PPS Pro mix, but I figure it would cost less in the long run to mix it myself. Is it possible to up the amount of KHPO4 and K2SO4 to make up for the decreased K from not using KNO3? Any drawbacks or dangers to my plants and fish if I do that?